Do not buy this, period. I did. It does not work. One day they may get the bugs out, but for now it is just a headache.
When you download a video, on Buzz Box, does anybody know where it goes and how to find it later?
From which app are you downloading the video from?
I remember those days. I had a 1st gen Samsung smart tv with 3 USB ports on it. I had 2 USB drives plugged into the tv with movies I downloaded. Ok some of them were duplicated from friends DVDs 
Pete